This polymer Ruger 4-round magazine is compatible with the American Rifle and the following short-action calibers: 308 Win 6.5 Creedmoor 6mm Creedmoor .243 Win. and 7mm-08 Rem.For the hunter the long-rance competitor or even for law enforcement applications this magazine can serve you well. Ruger uses a reliable internal spring and follower for consistent feeding and dependable performance.Ruger American Rifle MagazineCaliber: 308/243/7MM08/6.54 Round Capacity Polymer BodyYou can never have too many magazines for your American Rifle especially for target practice. Why bother coming off the gun completely to refill a magazine when you can just have extra full mags ready to go?Grab your Ruger American Rifle magazines online here today!Save time and money when you purchase .308 or 7.62x51 ammo at Ammunition Depot! Our online inventory of cheap ammo for sale is available from the top brands you know and trust.